<!DOCTYPE html>
<html lang="en" xmlns:v-bind="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
    <span v-bind:title="message">
    what f</span>
</div>
<div id="app2">
{{message}}
</div>
</body>
<script src="https://cdn.jsdelivr.net/npm/vue@2.6.11/dist/vue.min.js"></script>
<script>
    var vm = new Vue({
        el: "#app",
        data:{
            message:"hello,vue"
        }
    });

    var vm2 = new Vue({
        el: "#app2",
        data:{
            message:"hello,vue"
        }
    });
</script>

</html>